// Default attribute values.
Dygraph.DEFAULT_ATTRS = {
highlightCircleSize: 3,
+ highlightSeriesOpts: null,
+ highlightSeriesBackgroundAlpha: 0.5,
labelsDivWidth: 250,
labelsDivStyles: {
sigFigs: null,
strokeWidth: 1.0,
+ strokeBorderWidth: 0,
+ strokeBorderColor: "white",
axisTickSize: 3,
axisLabelFontSize: 14,
this.boundaryIds_ = [];
this.setIndexByName_ = {};
+ this.datasetIndex_ = [];
// Create the containing DIV and other interactive elements
this.createInterface_();
Dygraph.OPTIONS_REFERENCE[name] = true;
}
// </REMOVE_FOR_COMBINED>
- if (this.user_attrs_ !== null && seriesName &&
- typeof(this.user_attrs_[seriesName]) != 'undefined' &&
- this.user_attrs_[seriesName] !== null &&
- typeof(this.user_attrs_[seriesName][name]) != 'undefined') {
- return this.user_attrs_[seriesName][name];
- } else if (this.user_attrs_ !== null && typeof(this.user_attrs_[name]) != 'undefined') {
- return this.user_attrs_[name];
- } else if (this.attrs_ !== null && typeof(this.attrs_[name]) != 'undefined') {
- return this.attrs_[name];
- } else {
- return null;
+
+ var sources = [];
+ sources.push(this.attrs_);
+ if (this.user_attrs_) {
+ sources.push(this.user_attrs_);
+ if (seriesName) {
+ if (this.user_attrs_.hasOwnProperty(seriesName)) {
+ sources.push(this.user_attrs_[seriesName]);
+ }
+ if (seriesName === this.highlightSet_ &&
+ this.user_attrs_.hasOwnProperty('highlightSeriesOpts')) {
+ sources.push(this.user_attrs_['highlightSeriesOpts']);
+ }
+ }
+ }
+
+ var ret = null;
+ for (var i = sources.length - 1; i >= 0; --i) {
+ var source = sources[i];
+ if (source.hasOwnProperty(name)) {
+ ret = source[name];
+ break;
+ }
}
+ return ret;
};
/**
div.className = "dygraph-legend";
for (var name in messagestyle) {
if (messagestyle.hasOwnProperty(name)) {
- div.style[name] = messagestyle[name];
+ try {
+ div.style[name] = messagestyle[name];
+ } catch (e) {
+ this.warn("You are using unsupported css properties for your browser in labelsDivStyles");
+ }
}
}
this.graphDiv.appendChild(div);
};
/**
- * When the mouse moves in the canvas, display information about a nearby data
- * point and draw dots over those points in the data series. This function
- * takes care of cleanup of previously-drawn dots.
- * @param {Object} event The mousemove event from the browser.
- * @private
+ * Get the current graph's area object.
+ *
+ * Returns: {x, y, w, h}
*/
- Dygraph.prototype.mouseMove_ = function(event) {
- // This prevents JS errors when mousing over the canvas before data loads.
- var points = this.layout_.points;
- if (points === undefined) return;
+ Dygraph.prototype.getArea = function() {
+ return this.plotter_.area;
+ };
+ /**
+ * Convert a mouse event to DOM coordinates relative to the graph origin.
+ *
+ * Returns a two-element array: [X, Y].
+ */
+ Dygraph.prototype.eventToDomCoords = function(event) {
var canvasx = Dygraph.pageX(event) - Dygraph.findPosX(this.mouseEventElement_);
+ var canvasy = Dygraph.pageY(event) - Dygraph.findPosY(this.mouseEventElement_);
+ return [canvasx, canvasy];
+ };
- var lastx = -1;
- var i;
-
- // Loop through all the points and find the date nearest to our current
- // location.
- var minDist = 1e+100;
+ /**
+ * Given a canvas X coordinate, find the closest row.
+ * @param {Number} domX graph-relative DOM X coordinate
+ * Returns: row number, integer
+ * @private
+ */
+ Dygraph.prototype.findClosestRow = function(domX) {
+ var minDistX = null;
var idx = -1;
- for (i = 0; i < points.length; i++) {
+ var points = this.layout_.points;
+ var l = points.length;
+ for (var i = 0; i < l; i++) {
var point = points[i];
if (point === null) continue;
- var dist = Math.abs(point.canvasx - canvasx);
- if (dist > minDist) continue;
- minDist = dist;
+ var dist = Math.abs(point.canvasx - domX);
+ if (minDistX !== null && dist >= minDistX) continue;
+ minDistX = dist;
idx = i;
}
- if (idx >= 0) lastx = points[idx].xval;
+ return this.idxToRow_(idx);
+ };
- // Extract the points we've selected
- this.selPoints_ = [];
- var l = points.length;
- if (!this.attr_("stackedGraph")) {
- for (i = 0; i < l; i++) {
- if (points[i].xval == lastx) {
- this.selPoints_.push(points[i]);
+ /**
+ * Given canvas X,Y coordinates, find the closest point.
+ *
+ * This finds the individual data point across all visible series
+ * that's closest to the supplied DOM coordinates using the standard
+ * Euclidean X,Y distance.
+ *
+ * @param {Number} domX graph-relative DOM X coordinate
+ * @param {Number} domY graph-relative DOM Y coordinate
+ * Returns: {row, seriesName, point}
+ * @private
+ */
+ Dygraph.prototype.findClosestPoint = function(domX, domY) {
+ var minDist = null;
+ var idx = -1;
+ var points = this.layout_.points;
+ var dist, dx, dy, point, closestPoint, closestSeries;
+ for (var setIdx = 0; setIdx < this.layout_.datasets.length; ++setIdx) {
+ var first = this.layout_.setPointsOffsets[setIdx];
+ var len = this.layout_.setPointsLengths[setIdx];
+ for (var i = 0; i < len; ++i) {
+ var point = points[first + i];
+ if (point === null) continue;
+ dx = point.canvasx - domX;
+ dy = point.canvasy - domY;
+ dist = dx * dx + dy * dy;
+ if (minDist !== null && dist >= minDist) continue;
+ minDist = dist;
+ closestPoint = point;
+ closestSeries = setIdx;
+ idx = i;
+ }
+ }
+ var name = this.layout_.setNames[closestSeries];
+ return {
+ row: idx,
+ seriesName: name,
+ point: closestPoint
+ };
+ };
+
+ /**
+ * Given canvas X,Y coordinates, find the touched area in a stacked graph.
+ *
+ * This first finds the X data point closest to the supplied DOM X coordinate,
+ * then finds the series which puts the Y coordinate on top of its filled area,
+ * using linear interpolation between adjacent point pairs.
+ *
+ * @param {Number} domX graph-relative DOM X coordinate
+ * @param {Number} domY graph-relative DOM Y coordinate
+ * Returns: {row, seriesName, point}
+ * @private
+ */
+ Dygraph.prototype.findStackedPoint = function(domX, domY) {
+ var row = this.findClosestRow(domX);
+ var points = this.layout_.points;
+ var closestPoint, closestSeries;
+ for (var setIdx = 0; setIdx < this.layout_.datasets.length; ++setIdx) {
+ var first = this.layout_.setPointsOffsets[setIdx];
+ var len = this.layout_.setPointsLengths[setIdx];
+ if (row >= len) continue;
+ var p1 = points[first + row];
+ var py = p1.canvasy;
+ if (domX > p1.canvasx && row + 1 < len) {
+ // interpolate series Y value using next point
+ var p2 = points[first + row + 1];
+ var dx = p2.canvasx - p1.canvasx;
+ if (dx > 0) {
+ var r = (domX - p1.canvasx) / dx;
+ py += r * (p2.canvasy - p1.canvasy);
}
- }
- } else {
- // Need to 'unstack' points starting from the bottom
- var cumulative_sum = 0;
- for (i = l - 1; i >= 0; i--) {
- if (points[i].xval == lastx) {
- var p = {}; // Clone the point since we modify it
- for (var k in points[i]) {
- p[k] = points[i][k];
- }
- p.yval -= cumulative_sum;
- cumulative_sum += p.yval;
- this.selPoints_.push(p);
+ } else if (domX < p1.canvasx && row > 0) {
+ // interpolate series Y value using previous point
+ var p0 = points[first + row - 1];
+ var dx = p1.canvasx - p0.canvasx;
+ if (dx > 0) {
+ var r = (p1.canvasx - domX) / dx;
+ py += r * (p0.canvasy - p1.canvasy);
}
}
- this.selPoints_.reverse();
+ // Stop if the point (domX, py) is above this series' upper edge
+ if (setIdx > 0 && py >= domY) break;
+ closestPoint = p1;
+ closestSeries = setIdx;
}
+ var name = this.layout_.setNames[closestSeries];
+ return {
+ row: row,
+ seriesName: name,
+ point: closestPoint
+ };
+ };
- if (this.attr_("highlightCallback")) {
- var px = this.lastx_;
- if (px !== null && lastx != px) {
- // only fire if the selected point has changed.
- this.attr_("highlightCallback")(event, lastx, this.selPoints_, this.idxToRow_(idx));
+ /**
+ * When the mouse moves in the canvas, display information about a nearby data
+ * point and draw dots over those points in the data series. This function
+ * takes care of cleanup of previously-drawn dots.
+ * @param {Object} event The mousemove event from the browser.
+ * @private
+ */
+ Dygraph.prototype.mouseMove_ = function(event) {
+ // This prevents JS errors when mousing over the canvas before data loads.
+ var points = this.layout_.points;
+ if (points === undefined) return;
+
+ var canvasCoords = this.eventToDomCoords(event);
+ var canvasx = canvasCoords[0];
+ var canvasy = canvasCoords[1];
+
+ var highlightSeriesOpts = this.attr_("highlightSeriesOpts");
+ var selectionChanged = false;
+ if (highlightSeriesOpts) {
+ var closest;
+ if (this.attr_("stackedGraph")) {
+ closest = this.findStackedPoint(canvasx, canvasy);
+ } else {
+ closest = this.findClosestPoint(canvasx, canvasy);
}
+ selectionChanged = this.setSelection(closest.row, closest.seriesName);
+ } else {
+ var idx = this.findClosestRow(canvasx);
+ selectionChanged = this.setSelection(idx);
}
- // Save last x position for callbacks.
- this.lastx_ = lastx;
-
- this.updateSelection_();
+ var callback = this.attr_("highlightCallback");
+ if (callback && selectionChanged) {
+ callback(event, this.lastx_, this.selPoints_, this.lastRow_, this.highlightSet_);
+ }
};
/**
if (html !== '') html += (sepLines ? '<br/>' : ' ');
strokePattern = this.attr_("strokePattern", labels[i]);
dash = this.generateLegendDashHTML_(strokePattern, c, oneEmWidth);
- html += "<span style='font-weight: bold; color: " + c + ";'>" + dash +
+ html += "<span style='font-weight: bold; color: " + c + ";'>" + dash +
" " + labels[i] + "</span>";
}
return html;
c = this.plotter_.colors[pt.name];
var yval = fmtFunc(pt.yval, yOptView, pt.name, this);
+ var cls = (pt.name == this.highlightSet_) ? " class='highlight'" : "";
// TODO(danvk): use a template string here and make it an attribute.
- html += " <b><span style='color: " + c + ";'>" + pt.name +
- "</span></b>:" + yval;
+ html += "<span" + cls + ">" + " <b><span style='color: " + c + ";'>" + pt.name +
+ "</span></b>:" + yval + "</span>";
}
return html;
};
}
};
+ Dygraph.prototype.animateSelection_ = function(direction) {
+ var totalSteps = 10;
+ var millis = 30;
+ if (this.fadeLevel === undefined) {
+ this.fadeLevel = 0;
+ this.animateId = 0;
+ }
+ var start = this.fadeLevel;
+ var steps = direction < 0 ? start : totalSteps - start;
+ if (steps <= 0) {
+ if (this.fadeLevel) {
+ this.updateSelection_(1.0);
+ }
+ return;
+ }
+
+ var thisId = ++this.animateId;
+ var that = this;
+ Dygraph.repeatAndCleanup(
+ function(n) {
+ // ignore simultaneous animations
+ if (that.animateId != thisId) return;
+
+ that.fadeLevel += direction;
+ if (that.fadeLevel === 0) {
+ that.clearSelection();
+ } else {
+ that.updateSelection_(that.fadeLevel / totalSteps);
+ }
+ },
+ steps, millis, function() {});
+ };
+
/**
* Draw dots over the selectied points in the data series. This function
* takes care of cleanup of previously-drawn dots.
* @private
*/
- Dygraph.prototype.updateSelection_ = function() {
+ Dygraph.prototype.updateSelection_ = function(opt_animFraction) {
// Clear the previously drawn vertical, if there is one
var i;
var ctx = this.canvas_ctx_;
- if (this.previousVerticalX_ >= 0) {
+ if (this.attr_('highlightSeriesOpts')) {
+ ctx.clearRect(0, 0, this.width_, this.height_);
+ var alpha = 1.0 - this.attr_('highlightSeriesBackgroundAlpha');
+ if (alpha) {
+ // Activating background fade includes an animation effect for a gradual
+ // fade. TODO(klausw): make this independently configurable if it causes
+ // issues? Use a shared preference to control animations?
+ var animateBackgroundFade = true;
+ if (animateBackgroundFade) {
+ if (opt_animFraction === undefined) {
+ // start a new animation
+ this.animateSelection_(1);
+ return;
+ }
+ alpha *= opt_animFraction;
+ }
+ ctx.fillStyle = 'rgba(255,255,255,' + alpha + ')';
+ ctx.fillRect(0, 0, this.width_, this.height_);
+ }
+ var setIdx = this.datasetIndexFromSetName_(this.highlightSet_);
+ this.plotter_._drawLine(ctx, setIdx);
+ } else if (this.previousVerticalX_ >= 0) {
// Determine the maximum highlight circle size.
var maxCircleSize = 0;
var labels = this.attr_('labels');
var circleSize = this.attr_('highlightCircleSize', pt.name);
var callback = this.attr_("drawHighlightPointCallback", pt.name);
+ var color = this.plotter_.colors[pt.name];
if (!callback) {
callback = Dygraph.Circles.DEFAULT;
}
+ ctx.lineWidth = this.attr_('strokeWidth', pt.name);
+ ctx.strokeStyle = color;
+ ctx.fillStyle = color;
callback(this.g, pt.name, ctx, canvasx, pt.canvasy,
- this.plotter_.colors[pt.name], circleSize);
+ color, circleSize);
}
ctx.restore();
* using getSelection().
* @param { Integer } row number that should be highlighted (i.e. appear with
* hover dots on the chart). Set to false to clear any selection.
+ * @param { seriesName } optional series name to highlight that series with the
+ * the highlightSeriesOpts setting.
*/
- Dygraph.prototype.setSelection = function(row) {
+ Dygraph.prototype.setSelection = function(row, opt_seriesName) {
// Extract the points we've selected
this.selPoints_ = [];
var pos = 0;
if (row !== false) {
- row = row - this.boundaryIds_[0][0];
+ for (var i = 0; i < this.boundaryIds_.length; i++) {
+ if (this.boundaryIds_[i] !== undefined) {
+ row -= this.boundaryIds_[i][0];
+ break;
+ }
+ }
}
+ var changed = false;
if (row !== false && row >= 0) {
+ if (row != this.lastRow_) changed = true;
+ this.lastRow_ = row;
for (var setIdx = 0; setIdx < this.layout_.datasets.length; ++setIdx) {
var set = this.layout_.datasets[setIdx];
if (row < set.length) {
}
pos += set.length;
}
+ } else {
+ if (this.lastRow_ >= 0) changed = true;
+ this.lastRow_ = -1;
}
if (this.selPoints_.length) {
this.lastx_ = this.selPoints_[0].xval;
- this.updateSelection_();
} else {
- this.clearSelection();
+ this.lastx_ = -1;
+ }
+
+ if (opt_seriesName !== undefined) {
+ if (this.highlightSet_ !== opt_seriesName) changed = true;
+ this.highlightSet_ = opt_seriesName;
}
+ if (changed) {
+ this.updateSelection_(undefined);
+ }
+ return changed;
};
/**
*/
Dygraph.prototype.clearSelection = function() {
// Get rid of the overlay data
+ if (this.fadeLevel) {
+ this.animateSelection_(-1);
+ return;
+ }
this.canvas_ctx_.clearRect(0, 0, this.width_, this.height_);
+ this.fadeLevel = 0;
this.setLegendHTML_();
this.selPoints_ = [];
this.lastx_ = -1;
+ this.lastRow_ = -1;
+ this.highlightSet_ = null;
};
/**
return -1;
};
+ Dygraph.prototype.getHighlightSeries = function() {
+ return this.highlightSet_;
+ };
+
/**
* Fires when there's data available to be graphed.
* @param {String} data Raw CSV data to be plotted
if (labels.length > 0) {
this.setIndexByName_[labels[0]] = 0;
}
+ var dataIdx = 0;
for (var i = 1; i < datasets.length; i++) {
this.setIndexByName_[labels[i]] = i;
if (!this.visibility()[i - 1]) continue;
this.layout_.addDataset(labels[i], datasets[i]);
+ this.datasetIndex_[i] = dataIdx++;
}
this.computeYAxisRanges_(extremes);
};
/**
+ * Get the internal dataset index given its name. These are numbered starting from 0,
+ * and only count visible sets.
+ * @private
+ */
+ Dygraph.prototype.datasetIndexFromSetName_ = function(name) {
+ return this.datasetIndex_[this.indexFromSetName(name)];
+ };
+
+ /**
* @private
* Adds a default style for the annotation CSS classes to the document. This is
* only executed when annotations are actually used. It is designed to only be
projects / dygraphs.git / commitdiff